Exactly. Pretending that Facebook is the root of American political pathologies is the new "Blame Russia": just an obvious scapegoat to distract attention from the rotted institutions of power, beginning with US media corporations, that are doing the real damage.
Cable news creates more polarization than Facebook. The prestige media set the agenda more than Facebook. Hollywood, fashion and advertising create more body image issues than Facebook. It’s just that Facebook makes more money.